[FreeBSD] No input file specified

Hello!

A few days ago, we had to reinstall our server (FreeBSD 4.9). But, since the reinstall, none of our clients can enter their phpMyAdmin in CPanel. When they try to open it, all they get is:

When i try to open even the simplest php script, like:

PHP:

phpinfo();

(I place the file in /usr/local/cpanel/base/3rdparty/phpMyAdmin)
i get the same message.
When I try to view a HTML file I get a blank page. And when I try to view phpMyAdmin's README file I get an error message saying that the file hasn't been found.
What could be the couse of this and how to resolve this issue?
Thanks in advance for your help!

UPDATE: phpMyAdmin in WHM works just fine.